CN1265159C - Installation method of refrigerator and its temperature sensor - Google Patents

Abstract

The invention provides a direct cooling refrigerator which can quickly and accurately control the temperature of the refrigerator, shorten the on/off time of a compressor and restrain the temperature variation of a storage chamber to the minimum. It is characterized by comprising an external shell forming the appearance of the refrigerator; an inner case forming a storage chamber provided within the outer case; a heat insulating material filled between the inner case and the outer case; a compressor for compressing a refrigerant; an evaporator disposed in contact with the inner case, the refrigerant being evaporated while cooling the inner case; a temperature sensor for sensing the temperature of the inner casing, which is formed in a surface contact part closely fitted with the inner casing; and a control part for controlling the compressor according to the temperature sensed by the temperature sensor.

Description

Installation method of refrigerator and its temperature sensor

technical field

The invention relates to a direct-cooling refrigerator, in particular to a direct-cooling refrigerator in which the contact area between the inner housing forming the storage room and the temperature sensor is large, so that the temperature change of the storage room can be correctly and quickly sensed and the compressor can be controlled. How to install a refrigerator and its temperature sensor.

Background technique

In general, refrigerators are classified into two types according to their cooling methods. That is, a direct cooling type refrigerator that cools the storage room by directly cooling the inner case of a storage room forming a freezer or a refrigerating room using an evaporator, and a cooling fan that supplies cold air generated by heat exchange with the evaporator to the storage room Indirect refrigerator.

As shown in Figure 1, a common direct-cooling refrigerator comprises an outer casing 2 forming the outer shape of the refrigerator; an inner casing 4 forming a storage room F arranged inside the aforementioned outer casing 2; 2 and the insulation material 6 between the inner shell 4; the compressor 8 for compressing the refrigerant; the condenser 10 for condensing the high-pressure refrigerant gas passing through the aforementioned compressor 8 into a liquid state; The expansion mechanism 12 for depressurizing the refrigerant of 10; the evaporator 14 for cooling the storage compartment F by exchanging heat with the aforementioned inner case 4; the temperature sensor for measuring the temperature of the aforementioned inner case 4; and the control section, if the aforementioned The control unit activates the compressor 8 when the temperature sensed by the temperature sensor is above a first predetermined value (for example, 5°C), and stops the compressor 8 if it is below a second predetermined value (for example -30°C).

Wherein, the temperature sensor is composed of an electric heating component 16 in line contact with one side of the inner housing 4 and a thermistor for measuring the temperature of the electric heating component 16 and outputting a temperature signal to the control unit.

One side of the electric heating component 16 is wrapped and attached by an aluminum strip 19 attached to the outer surface of the inner casing 4 , and is in longitudinal line contact with the outer surface of the inner casing 4 .

Next, the operation of the conventional direct cooling refrigerator having the above-mentioned structure will be described.

If the high-temperature and high-pressure vapor-state refrigerant compressed by the compressor 8 flows into the condenser 10, the condenser 10 releases heat to change the refrigerant into a liquid state at normal temperature and pressure. Then, the refrigerant condensed by the condenser 10 passes through the expansion mechanism 12 and is decompressed, then passes through the evaporator 14 and exchanges heat with the inner casing 4, thereby cooling the inner casing 4, thereby the storage chamber The inside of F is kept low temperature by conduction between the air in the storage room F and the inner casing 4 and the natural convection inside the storage room F.

On the other hand, the heat of the inner casing 4 is transferred to the electric heating component 16, and the thermistor measures the temperature of the electric heating component 16, and sends a signal based on the temperature to the control unit.

The aforementioned control unit that has received the temperature signal, if it judges that the temperature of the inner casing 4 is below the second specified value (for example -30° C.), then outputs an OFF signal to the compressor 8 to stop driving the aforementioned compressor 8; If it is judged that the temperature of the inner case 4 is above a first predetermined value (for example, 5° C.), an ON signal for driving the compressor 8 is output.

However, in the above-mentioned direct cooling refrigerator of the prior art, the electrothermal component 16 of the aforementioned temperature sensor is in line contact with the inner housing 4, so it takes a certain amount of time for the heat of the aforementioned inner housing 4 to be transferred to the electrothermal component 16 of the temperature sensor. The on/off of the compressor 8 cannot be quickly controlled according to the temperature change of the storage room F. In addition, because a part of the electric heating component 16 of the aforementioned temperature sensor is easily in poor contact with the aforementioned inner casing 4, there is a deterioration in the temperature sensing performance, and the sensing temperature A problem with big changes.

And, in the direct cooling type refrigerator of above-mentioned prior art, the electrothermal part 16 of aforementioned temperature sensor is fixed on the aluminum band 19, and aforementioned aluminum band 19 is fixed on internal housing 4, so the electrothermal part 16 of aforementioned temperature sensor is installed Strong, external collisions and the like are likely to cause poor contact between the electric heating component 16 of the temperature sensor and the inner housing 4 .

Contents of the invention

The present invention is proposed in view of the aforementioned problems of the prior art, and its purpose is to provide a direct-cooling refrigerator capable of quickly and correctly controlling the temperature of the refrigerator.

Another object of the present invention is to provide a direct cooling refrigerator capable of shortening the ON/OFF time of the compressor and preventing the temperature of the storage room from fluctuating more than a predetermined value.

Another object of the present invention is to provide a method for installing a temperature sensor of a refrigerator in which the temperature sensor can be securely installed on an inner case.

In order to achieve the above objects, the refrigerator of the present invention is characterized by comprising: an outer case forming the outer shape of the refrigerator; an inner case forming a storage room provided in the outer case; insulation between the shells; a compressor for compressing the refrigerant; an evaporator positioned in contact with the inner shell to cool the inner shell while the refrigerant is evaporated; forming a tight fit with the inner shell a surface contact part for sensing the temperature of the inner casing; and a control part for controlling the compressor according to the temperature sensed by the temperature sensor, wherein the temperature sensor is formed by adhering on the inner casing The electric heating component of the surface contact part, and the temperature sensing part arranged on one side of the electric heating component and sensing the temperature of the electric heating component.

The method for installing a temperature sensor of a refrigerator according to the present invention is characterized by comprising: a first stage of forming a surface contact portion on the temperature sensor that is in surface contact with the inner casing; a second step of adhering an adhesive material to the surface contact portion of the temperature sensor. stage; and a third stage in which the surface contact portion of the temperature sensor is engaged with the inner casing, so that the temperature sensor is tightly sealed to the inner casing.

The method for installing the temperature sensor of the refrigerator according to the present invention is characterized in that it includes: the first stage of forming a surface contact portion on the temperature sensor that is in surface contact with the inner casing; a second stage of the release tape of the material; and after removing the release tape from the temperature sensor to expose the adhesive material, the face contact portion of the temperature sensor engages the inner housing, thereby making the temperature sensor hermetic The third stage on the inner shell.

In the refrigerator of the present invention, the inner casing forming the storeroom is in surface contact with the temperature sensor for measuring the temperature of the inner casing, and the heat of the inner casing is transmitted to the temperature sensor through the surface contact portion of the inner casing and the temperature sensor, so it has The advantage of being able to quickly sense temperature changes in storage compartments and internal housings.

In addition, since the temperature sensor is in surface contact with the inner casing, fluctuations in the sensed temperature are suppressed to a minimum.

In addition, the temperature sensor quickly and accurately senses the temperature of the inner casing, shortening the ON/OFF time of the compressor, thereby preventing the temperature fluctuation of the storage compartment from exceeding a predetermined value.

In addition, in the temperature sensor installation method of the direct cooling refrigerator of the present invention, after forming a surface contact portion in surface contact with the inner casing in the temperature sensor, an adhesive material is adhered to the surface contact portion of the temperature sensor, and the temperature sensor The surface contact portion of the inner casing is engaged with the inner casing, so that the temperature sensor is tightly sealed on the inner casing, so the temperature sensor can quickly sense the temperature change of the inner casing, and in addition, the fluctuation of the sensed temperature can be minimized, And the temperature sensor can be firmly fixed on the inner casing.

In addition, in the temperature sensor installation method of the direct cooling refrigerator of the present invention, after forming the surface contact portion in surface contact with the inner casing in the temperature sensor, the surface contact portion of the temperature sensor is pasted and coated with an adhesive material. The state of the release tape is used to transport or store the temperature sensor. Therefore, the transportation or storage of the temperature sensor is easy. Before the temperature sensor is installed, the release tape is removed from the temperature sensor to expose the adhesive material. The surface of the temperature sensor The contact part is engaged with the inner casing, so that the temperature sensor is tightly sealed on the inner casing, so the temperature sensor can quickly sense the temperature change of the inner casing, furthermore, the fluctuation of the sensed temperature can be minimized, and the The temperature sensor is firmly fixed to the inner housing.

Description of drawings

FIG. 1 is an internal configuration diagram showing an example of a general direct cooling refrigerator.

Fig. 2 is a block diagram showing the cycle of the first embodiment of the direct cooling refrigerator of the present invention.

Fig. 3 is a diagram showing the internal structure of the first embodiment of the direct cooling refrigerator of the present invention.

FIG. 4 is an enlarged view of part A shown in FIG. 3 .

Fig. 5 is a perspective view showing a temperature sensor of the direct cooling refrigerator of the present invention.

Fig. 6 is a sectional view showing the structure of main parts of a direct cooling refrigerator according to a second embodiment of the present invention.

Fig. 7 is a sectional view showing the structure of main parts of a direct cooling refrigerator according to a third embodiment of the present invention.

Fig. 8 is a sequence diagram showing the first embodiment of the method of installing the temperature sensor of the refrigerator according to the present invention.

Fig. 9 is an enlarged sectional view of the direct cooling refrigerator of the present invention before the temperature sensor is installed.

Fig. 10 is a sequence diagram showing a second embodiment of the method of installing the temperature sensor of the direct cooling refrigerator of the present invention.

Fig. 11 is an enlarged cross-sectional view of the direct cooling refrigerator of the present invention before the temperature sensor is installed.

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 2 is a block diagram showing the cycle of the first embodiment of the direct cooling refrigerator of the present invention, and Fig. 3 is an internal structure diagram showing the first embodiment of the direct cooling refrigerator of the present invention, and Fig. 4 is a diagram of the structure shown in Fig. 3 Enlarged view of part A.

As shown in Figures 2 to 4, the direct-cooling refrigerator of the present embodiment includes an outer casing 52 forming the outer shape of the refrigerator; an inner casing 54 forming a storage room F arranged in the aforementioned outer casing 52; A compressor 56 for compressing refrigerant; a condenser 58 for condensing high-pressure refrigerant gas passing through the compressor 56 into a liquid state; an expansion mechanism 60 for decompressing the refrigerant passing through the condenser 58; An evaporator 62 that cools the inner case 54 by exchanging heat with the inner case 54 while the refrigerant at 60 is evaporated; an insulating material 64 filled between the outer case 52 and the inner case 54; The surface contact portion S attached to the internal housing 54 is a temperature sensor 66 for sensing the temperature of the internal housing 54 ; and a control unit 70 for controlling the compressor 56 according to the temperature sensed by the temperature sensor 66 .

The evaporator 62 is attached to the outer surface of the inner casing 54 and surrounded by the heat insulating material 64 .

The evaporator 62 is an evaporator tube wound vertically on the outer peripheral surface of the inner case 54 , and is fixed by an aluminum band 63 attached to the inner case 54 .

The aforementioned temperature sensor 66 consists of an electrothermal component 67 attached to the aforementioned internal housing 54, forming a surface contact portion S on at least one side, and contacts with one side of the electrothermal component 67, and outputs a signal based on the temperature of the electrothermal component 67 to The thermistor 68 of the aforementioned control unit 70 is constituted.

As shown in FIG. 4 , the electric heating component 67 is attached to the outer surface of the inner casing 54 and surrounded by the heat insulating material 64 , and the surface contact portion S is formed in the longitudinal direction of the electric heating component 67 .

The aforementioned electric heating component 67 is made of soft synthetic resin or metal.

The aforementioned electric heating component 67 has two side surfaces 67a, 67b forming a flat plate shape, and an upper side surface 67c and a lower side surface 67d forming a bar structure in a curved shape. As shown by the arrow in FIG. 4 , the heat of the inner casing 54 is transferred to the electric heating component 67 through the surface contact portion S.

In addition, an adhesive material T is attached to the surface contact portion S, and the electrothermal component 67 is bonded to the inner case 54 through the adhesive material T. As shown in FIG.

If the temperature value sensed by the temperature sensor 66 is above a first predetermined value (for example, 5°C), the aforementioned control unit 70 activates the aforementioned compressor 56, and if it is below a second predetermined value (for example, -30°C), the compressor 56 is activated. The device 56 stops.

An unexplained symbol 72 is a door for opening and closing the storage room F described above.

Fig. 5 is a perspective view showing a temperature sensor of the direct cooling refrigerator of the present invention.

As shown in FIG. 5 , the temperature sensor 66 further includes a covering material 69 surrounding the contact portion of the electric heating component 67 and the thermistor 68 .

Unexplained reference numeral 68 a is an electric wire connected to the thermistor and outputting a signal according to temperature to the control unit 70 .

Next, the operation of the present invention having the above-mentioned configuration will be described.

First, as shown by the arrow in Figure 4, the heat of the aforementioned inner casing 54 is quickly transferred to the aforementioned electrothermal element 67 through the contact portion between the aforementioned electrothermal element 67 and the inner casing 54, that is, the surface contact portion S, and the aforementioned thermistor 68 measures the aforementioned The temperature of the electrothermal component 67 and a signal based on the temperature are sent to the aforementioned control unit 70 .

Upon receiving this signal, the control unit 70 outputs an ON signal for driving the compressor 56 when it judges that the temperature of the inner case 54 is higher than a first predetermined value (for example, 5° C.).

When the compressor 56 is activated, the refrigerant compressed by the compressor 56 flows into the condenser 58 in a high-temperature and high-pressure vapor state, releases heat to the periphery of the condenser 58, and is condensed into a liquid state at room temperature and high pressure. Then, the refrigerant condensed by the condenser 58 is decompressed by the expansion mechanism 60 , is evaporated while passing through the evaporator 62 while absorbing heat from the inner case 54 , and is recycled to the compressor 56 .

During the compression, condensation, expansion, and evaporation of the refrigerant as described above, the inner casing 54 releases heat to the refrigerant passing through the evaporator 58 to be cooled, and the inside of the storage room F is cooled by the Air is cooled by conduction of the inner casing 54 and natural convection in the storage compartment F.

On the other hand, during the cooling of the aforementioned inner housing 54 and the storage chamber F, as shown by the arrows in FIG. To the electric heating component 67 , the thermistor 68 measures the temperature of the electric heating component 67 , and sends a signal based on the temperature to the control unit 70 .

Upon receiving the signal, the control unit 70 outputs an OFF signal to the compressor 56 and stops driving the compressor 56 if it determines that the temperature of the inner casing 54 is below a second predetermined value (for example, -30° C.).

While the compressor 56 is stopped, the low-temperature refrigerant does not pass through the compressor 56, and the heat passing through the heat insulating material 64 and the door 72 gradually heats up the air in the storage compartment F, so that the air in the storage compartment F will not be overcooled to a specified value ( For example -30°C) or below.

Then, the refrigerator repeatedly turns on/off the compressor 56 according to the temperature sensed by the temperature sensor 66 .

Fig. 6 shows a temperature sensor of a second embodiment of the present invention.

The temperature sensor shown in FIG. 6 includes an electrothermal component 80 whose cross-section is quadrangular, and one side 80 a of four sides 80 a , 80 b , 80 c , 80 d is in surface contact with the inner housing 54 .

That is, in the temperature sensor, the one side 80a of the electrothermal component 80 is the surface contact portion S that is in surface contact with the inner casing 54, and the three sides 80b, 80c, and 80d other than the one side 80a are surrounded by the heat insulating material 64 .

Fig. 7 shows a temperature sensor of a third embodiment of the present invention.

The temperature sensor shown in FIG. 7 includes an electrothermal component 90 whose cross-section is semicircular, and a flat side 90 a is in surface contact with the inner casing 54 .

That is, in the temperature sensor, the one side surface 90 a of the electrothermal component 90 forms a surface contact portion S in surface contact with the inner case 54 , and the portion other than the one side surface 90 a is surrounded by the heat insulating material 64 .

On the other hand, FIG. 8 shows the first embodiment of the method for installing the temperature sensor of the direct cooling refrigerator of the present invention, and FIG. 9 shows an enlarged cross-sectional view of the temperature sensor of the direct cooling refrigerator of the present invention before installation.

First, in the first stage ( S1 ), a surface contact portion S that is in surface contact with the inner case 54 is formed on the temperature sensor 66 .

The aforementioned first stage consists of a first process of forming the electrothermal component 67 with at least one side 67a being flat, and a second process of fixing the electrothermal component 67 and thermistor 68 formed in the first process.

In the aforementioned first process, the synthetic resin is melted, injected into the metal mold formed by the flat plate portion, and solidified. A liquid covering material 69 is applied and solidified.

In the second stage (S2), an adhesive material T is applied to one side surface 67a of the temperature sensor 66, that is, the surface contact portion S. As shown in FIG.

In the third stage ( S3 ), the surface contact portion S of the temperature sensor 66 is joined to the inner case 54 , so that the temperature sensor 66 is tightly adhered to the inner case 54 .

The aforementioned temperature sensor 66 is firmly fixed to the inner case 54 in a state where the surface contact portion S is in surface contact with the inner case 54 .

On the other hand, FIG. 10 shows a second embodiment of the method for installing the temperature sensor of the direct cooling refrigerator of the present invention, and FIG. 11 shows an enlarged cross-sectional view of the temperature sensor of the direct cooling refrigerator of the present invention before installation.

First, in the first stage ( S11 ), a surface contact portion S that is in surface contact with the inner case 54 is formed on the temperature sensor 66 .

The first stage of this embodiment is the same as the first stage of the first embodiment of the temperature sensor installation method of the direct cooling refrigerator of the present invention.

In the second stage ( S12 ), the release tape U coated with the adhesive material T is adhered to the surface contact portion S which is one side surface 67 a of the temperature sensor 66 .

Here, it is preferable that the said release tape U is comprised with the easy-to-release release paper or a synthetic resin film.

Then, the temperature sensor 66 is transported or stored in a state where the release tape U coated with the adhesive material T is adhered.

In the third stage (S13), after the release tape U is removed from the temperature sensor 66 to expose the adhesive material T, the surface contact portion S of the temperature sensor 66 is bonded to the inner case 54, thereby making the temperature sensor 66 Closely attached to the inner casing 54 .

Accordingly, the temperature sensor 66 is firmly fixed to the inner case 54 in a state where the surface contact portion S is in surface contact with the inner case 54 .

Claims (7)

1. A direct cooling refrigerator, comprising: an outer casing forming the shape of a refrigerator; an inner housing forming a storage compartment disposed within said outer housing; an insulating material filled between the inner shell and the outer shell; a compressor for compressing the refrigerant; an evaporator positioned in contact with the inner housing to cool the inner housing while the refrigerant is evaporated; Forming a surface contact portion tightly fitted with the inner casing, a temperature sensor for sensing the temperature of the inner casing; and controlling a control unit of the compressor according to the temperature sensed by the temperature sensor, It is characterized in that the temperature sensor is composed of an electric heating component formed with a surface contact part adhered to the inner casing, and a temperature sensing part arranged on one side of the electric heating component and sensing the temperature of the electric heating component. 2. The direct-cooling refrigerator according to claim 1, wherein the temperature sensing part is made of a heat sensor that is in contact with one side of the electric heating component and outputs a signal based on the temperature of the electric heating component to the control part. Sensitive resistor composition. 3. The direct cooling refrigerator according to claim 1 or 2, characterized in that the electric heating component is made of soft synthetic resin. 4. The direct cooling refrigerator according to claim 1 or 2, characterized in that the electric heating component is made of metal. 5. The direct-cooling refrigerator according to claim 1 or 2, wherein the electric heating component has a rod structure in which both sides form a flat plate shape, and the upper surface and the lower surface form a curved shape. 6. The direct cooling refrigerator according to claim 1 or 2, characterized in that, the cross-sectional shape of the electric heating component is quadrangular. 7 . The direct cooling refrigerator according to claim 2 , wherein the temperature sensor further comprises a covering material surrounding the contact portion of the electric heating component and the thermistor. 7 .

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